From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753464AbbEMGUA (ORCPT ); Wed, 13 May 2015 02:20:00 -0400 Received: from mga11.intel.com ([192.55.52.93]:53183 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751639AbbEMGTM (ORCPT ); Wed, 13 May 2015 02:19:12 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,419,1427785200"; d="scan'208";a="492930290" From: Wanpeng Li To: Ingo Molnar , Peter Zijlstra Cc: Juri Lelli , linux-kernel@vger.kernel.org, Wanpeng Li Subject: [PATCH v2 6/7] sched/core: remove superfluous resetting of dl_throttled flag Date: Wed, 13 May 2015 14:01:06 +0800 Message-Id: <1431496867-4194-6-git-send-email-wanpeng.li@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1431496867-4194-1-git-send-email-wanpeng.li@linux.intel.com> References: <1431496867-4194-1-git-send-email-wanpeng.li@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Resetting dl_throttled flag in rt_mutex_setprio (for a task that is going to be boosted) is superfluous, as the natural place to do so is in replenish_dl_entity(). If the task was on the runqueue and it is boosted by a DL task, it will be enqueued back with ENQUEUE_REPLENISH flag set, which can guarantee that dl_throttled is reset in replenish_dl_entity(). This patch drops the resetting of throttled status in function rt_mutex_setprio(). Signed-off-by: Wanpeng Li --- v1 -> v2: * rewrite patch subject and changelog kernel/sched/core.c | 1 - 1 file changed, 1 deletion(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 355f953..a9fd4916 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3087,7 +3087,6 @@ void rt_mutex_setprio(struct task_struct *p, int prio) if (!dl_prio(p->normal_prio) || (pi_task && dl_entity_preempt(&pi_task->dl, &p->dl))) { p->dl.dl_boosted = 1; - p->dl.dl_throttled = 0; enqueue_flag = ENQUEUE_REPLENISH; } else p->dl.dl_boosted = 0; -- 1.9.1